Panzer Gruppe is a set of free wargames rules for corps/army sized battles in World War II.
Rules: WWII
RKAA Brigade Commander Rules
RKAA Brigade Commander is a set of free wargames rules for brigade sized encounters in World War II on the Eastern Front.
Raum Krieg
Raum Krieg is set in an alternate history where Germany and the Allies battle it out in the skies with UFO Technology.
Flames of War Desert Campaign
Running a “campaign” can add context and interest to a miniature wargame. Here’s a Tobruk Desert Campaign for Flames of War.
Flames of War Quick Start Rules
The folk at the Flames of War offer “Open Fire,” a set of quickstart rules for 15mm WWII gaming.